SYSTEMS AND METHODS FOR REDUCING INTERMODULATION FOR ELECTRONICALLY CONTROLLED ADAPTIVE ANTENNA ARRAYS
First Claim
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1. A system comprising:
- a shared feed;
an adaptive array of unit cells, wherein each unit cell comprises a radiating element and an adjustment element co-located with the radiating element, wherein the adjustment element comprises a tunable material; and
a transition control component configured to selectively induce a change in an electromagnetic property of the tunable material to control at least one of an activation or a degree of radiation of the radiating element.
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Abstract
The present disclosure provides a system and methods for mitigating, or reducing, the intermodulation of an adaptive antenna array'"'"'s radiating elements. A tunable element or tunable material, such as a phase change material or a state change material, may be used to increase linearity of the RF transmission properties. These phase or state change materials may modify a radiating element'"'"'s electromagnetic response. In some embodiments, variable couplers may further be added to a system to reduce intermodulation. An adaptive antenna array using the techniques described herein may have all or some of the elements co-located.
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Citations
233 Claims
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1. A system comprising:
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a shared feed; an adaptive array of unit cells, wherein each unit cell comprises a radiating element and an adjustment element co-located with the radiating element, wherein the adjustment element comprises a tunable material; and a transition control component configured to selectively induce a change in an electromagnetic property of the tunable material to control at least one of an activation or a degree of radiation of the radiating element. - View Dependent Claims (3, 7, 8, 10, 38, 47, 48, 59, 66, 67, 73, 75, 77, 82, 88, 91, 98)
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112. A method comprising:
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delivering an electromagnetic signal to a shared feed; feeding an electromagnetic signal from the shared feed to an adaptive array of unit cells, wherein each unit cell comprises a radiating element and an adjustment element co-located with the radiating element, and modifying, via a transition control component of at least one adjustment element, an electromagnetic property of a tunable material of the at least one adjustment element to control at least one of an activation or a degree of radiation of the radiating element. - View Dependent Claims (113, 114, 119, 144, 164, 172, 173, 180, 184, 187, 194, 201, 202, 204, 205)
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213. A system comprising:
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a first layer comprising a shared feed; a second layer comprising an array of radiating elements, wherein a radiating element is reactively coupled with one or more neighboring radiating elements within the second layer; a third layer comprising an array of near-field coupling elements coupled to the radiating elements in the second layer, wherein each coupling element is configured to selectively control a field coupling level between one or more radiating elements and the shared feed, a plurality of coupling control components configured to control the field coupling level between the one or more radiating elements, wherein the coupling control components are substantially nonresponsive to electromagnetic fields provided by the shared feed. - View Dependent Claims (215, 218, 221, 225, 232)
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Specification